Had the same idea a few weeks backs and came up with the following...
https://github.com/blert2112/uw/archive/master.zipIt doesn't have the Corridors mod merged in and that is, by far, the biggest part of your speed problem. When I tried your modpack it would very often freeze while waiting for the Corridors mod to do something. Another part of the speed problem is using three LVMs when you could be using just one.
My mod does the following using only the one LVM...
- Place impenetrable bedrock layers at the minimum and maximum depths. You cannot dig or blast your way into the Underworld, you must use a portal.
- Convert all nodes within minimum and maximum depth into Underworld nodes, including dungeons.
- Generate big caves only between minimum and maximum depths.
- Has option to mitigate lava if you choose to do so.
Quick and dirty speed testing on my system came up with...
Subterrain mod (ms per chunk):
100's to 120's,
occasional dips into the 90's and jumps into the 150's,
rare jumps above 160
my mod (ms per chunk):
120's to 130's,
occasional dips into the 100's and jumps into the 160's
rare jumps above 180
Of course, it's all subjective numbers. As I said, t'was just a quick and dirty test session.
Plans for the future:
Add something like the Corridors mod, but a much better way to do it is needed IMO.
Figure out how to quickly place a portal into a dungeon or cave upon activation of a new portal, I hate portaling in to a 4x4 square.
Adjust node colors, they just don't seem quite right yet.
If you find you would like to work with this mod then please give credit to the original mod creators... See licenses.txt for that info.